private void RemoveSurroundedNodes()
{
for (int y = 0; y < mapSize; y++)
{
for (int x = 0; x < mapSize; x++)
{
int[,] neighbours = GridMath.GetNeighbours(_mapGrid, new Vector2Int(x, y), 1);
if (GridMath.CheckSurroundedFully(neighbours, 1))
{
_mapGrid[y, x] = 0;
}
}
}
}